CompTIA Updated 220-1201 Exam Questions and Answers by hettie

The correct statement when comparing DDR3 and DDR4 memory technologies is that DDR4 offers faster data transfer rates compared to DDR3. According to CompTIA Core 1 (220-1201) memory and hardware objectives, DDR4 was designed as the successor to DDR3 and provides several performance and efficiency improvements.

DDR3 memory typically operates at data transfer rates ranging from 800 MT/s to 2133 MT/s, while DDR4 starts at 2133 MT/s and can scale significantly higher depending on the module and platform. This increased transfer rate allows DDR4 to handle more data per second, improving overall system performance, especially in modern systems and multitasking environments.

Option B is incorrect because DDR4 achieves higher bandwidth, not DDR3. Option C is incorrect because DDR4 operates at a lower voltage (typically 1.2V) compared to DDR3 (typically 1.5V), making DDR4 more power efficient. Option D is also incorrect because DDR4 is better suited for low-power environments due to its reduced voltage requirements.

CompTIA emphasizes understanding RAM generations, including differences in speed, bandwidth, and power consumption, making DDR4’s higher data transfer rates a key distinguishing factor.

A docking station allows users to connect multiple peripherals (monitor, keyboard, mouse, etc.) to a laptop with a single connection, reducing cable clutter and improving convenience.

From CompTIA A+ 220-1101 Official Study Guide, Objective 3.1 – Laptop hardware and connections:

“A docking station enables the use of multiple external devices with a laptop using only one or two connections, making it ideal for office environments.”

Verified Source:

CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 3: Laptop Hardware

CompTIA Exam Objectives 220-1101, Domain 3.1

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Comprehensive and Detailed Explanation:

Laptop Wi-Fi antennas run through the display bezel and connect via small coaxial clips. After motherboard replacement, these are often not fully seated, causing weak or unstable Wi-Fi.

CompTIA Concepts:

Laptop hardware troubleshooting

Antenna connector checks after repair

WLAN performance issues caused by antenna misalignment

Running multiple operating systems at the same time on a single physical server is accomplished through virtualization. In this scenario, host-based virtualization means a host operating system is installed on the physical server first, and then virtualization software runs on top of that OS to create and manage multiple virtual machines. Each virtual machine can run its own guest operating system independently, while sharing the server’s CPU, RAM, storage, and network resources. This improves hardware utilization because one physical server can replace multiple separate machines, and resources can be allocated to VMs based on workload needs.

The other options do not directly describe the concept of running multiple OS instances on the same physical hardware. Public cloud services describe a delivery model where resources are provided by a third-party provider, but the underlying concept enabling multiple OS instances is still virtualization. High-availability clustering focuses on redundancy and failover across multiple servers. Software as a service provides a completed application to users, not multiple OS instances. Load balancing distributes traffic across systems and does not create separate operating systems. Therefore, the correct choice is host-based virtualization.